Combined control device and display unit for telephone exchange



FIG. 1 is a top front perspective view of a combined control device and display unit for a telephone exchange;

FIG. 2 is a front elevation thereof;

FIG. 3 is a rear perspective view thereof; and

FIG. 4 is a rear perspective view of the control device, shown separately for clarity of illustration. 

The ornamental design for a combined control device and display unit for telephone exchange, as shown and described. 